2004 Porsche Boxster codes PO491 and PO492

BIG HACK74

MEMBER

2004 PORSCHE BOXSTER

3.2L

6 CYL

2WD

MANUAL

1,700 MILES

Hello, looking at buying a 2004 Boxster S, ( 550 spider edition) only has 1700 miles, ( from an estate), these codes pop up, and the screen says"go directly to garage" I understand that the code involves secondary air flow, does it require fixing immediately, are can it wait as I drive it a bit? Will the fix require removing the engine? Thank you, Bruce in Indy